I agree, who really cares what engine it has in it. If they're going to drop weight, beef the suspension, and put a light-weight I-4 in it, it's going to be a track monster. It'll probably be more of a purist, tracker than the M3/M4 which will undoubtedly be heavier, more luxurious and more about straight line.

I bet you this car will be extremely fun, and maybe not very practical. This would be like a Cayman S/R, likely somebody's weekend/track car not DD.